Difficutties in Cambridge A-level

[terainfizik]

I now having problems with subject physics and chemistry ! I'm from M'sia . I 'd need advice how do I spend my time on my studies so that I have efficient time for studies . Strategy studies advice too... I always get really low grades for these two subjects...Pls help me...

 

[michealsmith]

i don't know ,,,someone else will reply though who knows .
wat i do know is that if u have any physics problems you can definitely come in here and ask .One thing for physics ,is that you should have a course syllabus , look at that and see what you need to learn , you could show it to one of us , if your not sure wat all the topics are about and how much depth you need to go into all of them , or anything else similar to that .Try and have a certain number of books and maybe a physics glossary from online.

 

[terainfizik]

Really need everyone in this thread help

Everyone in this thread , I need everyone's help . I'm struggling...

 

[yenchin]

Perhaps you should be more specific in telling us what problems you have with the subjects. People find it easier to reply to specific questions than a broad one like yours.

 

[michealsmith]

Yep Be Specific..topics Ur Studying ..etc Whcih U Find Difficult ..wat U Dont Understand ?

 

[terainfizik]

Stress and Strain

Q: A copper wire of diameter d is stretched by a load hanging vertically from its lower end . The strain of the wire is 8.0x10^-4 . What's the strain in another copper wire of the same length but of diamteter 2d ?
A: 2x10^-4

Q: A light rod of length L hangs from the lower ends of two vertical wires M and N which are of the same natural length and diameter but ve differrent Young's moduli E1 and E2 respectively . A load is placed on the rod at a distance x from the wire M, so that the rod remains horizontal . What's the value of x in terms of L, E1 and E2 ?
A: (E2L)/ (E1+E2 )


Q - questions
A - answer

I would be glad anyone solve this as soon as possible . It would be great explain diagram , equations , steps by steps . Tnx . There ll be more questions.

 

[terainfizik]

I want the solution .

 

[michealsmith]

put this question in homework help section